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Fifth lecture Advanced Quantum Mechanics

I took time slot of a Thursday problem-solving session. This was mostly to achieve a better synchronization between the lectures and PPS. Unfortunate effect on this is that the students are bored with my face since I show up too often. So I was told by my colleagues. I have to believe in this since I myself is seldom bored with my own face.

Anyway, this was my favorite topic(s): superconductivity and superfluidity. I enjoyed talking and told at least three “side” stories, in particular, the legend about Leiden street boy. I think I could do all important things on time.

There was a question about some skipped algebra in the break. I always get confused with such questions and perhaps did not react adequately. Actually, for all twenty years I’m giving the lectures I never managed to derive for myself a golden rule that would automatically tell me how much derivations I need to hide. So I always remain in a stressfull balance between “…substitute zis to zis and see how beautiful is the cancellation of factors of 2 in the numerator and denominator…” and “as, you know, you can easily see …” Between Scylla and Charybdis is my endless way 🙂

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